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GeForce GTX 780 Ti vs Nvidia Titan X


Intro

The GeForce GTX 780 Ti features a core clock speed of 875 MHz and a GDDR5 memory speed of 1750 MHz. It also features a 384-bit bus, and uses a 28 nm design. It is made up of 2880 SPUs, 240 TAUs, and 48 ROPs.

Compare that to the Nvidia Titan X, which comes with a clock frequency of 1417 MHz and a GDDR5X memory frequency of 1251 MHz. It also makes use of a 384-bit bus, and uses a 16 nm design. It is made up of 3584 SPUs, 224 Texture Address Units, and 96 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Both cards have the same power consumption.

Memory Bandwidth

In theory, the Nvidia Titan X should be 46% faster than the GeForce GTX 780 Ti in general, due to its higher bandwidth. (explain)

Nvidia Titan X 491520 MB/sec
GeForce GTX 780 Ti 336000 MB/sec
Difference: 155520 (46%)

Texel Rate

The Nvidia Titan X will be much (more or less 51%) faster with regards to texture filtering than the GeForce GTX 780 Ti. (explain)

Nvidia Titan X 317408 Mtexels/sec
GeForce GTX 780 Ti 210000 Mtexels/sec
Difference: 107408 (51%)

Pixel Rate

The Nvidia Titan X will be much (more or less 224%) better at AA than the GeForce GTX 780 Ti, and will be capable of handling higher screen resolutions while still performing well. (explain)

Nvidia Titan X 136032 Mpixels/sec
GeForce GTX 780 Ti 42000 Mpixels/sec
Difference: 94032 (224%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

GeForce GTX 780 Ti

Nvidia Titan X

Specifications

Display Specifications

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Model GeForce GTX 780 Ti Nvidia Titan X
Manufacturer nVidia nVidia
Year November 2013 August 2016
Code Name GK110 GP102-400
Memory 3072 MB 12288 MB
Core Speed 875 MHz 1417 MHz
Memory Speed 7000 MHz 10008 MHz
Power (Max TDP) 250 watts 250 watts
Bandwidth 336000 MB/sec 491520 MB/sec
Texel Rate 210000 Mtexels/sec 317408 Mtexels/sec
Pixel Rate 42000 Mpixels/sec 136032 Mpixels/sec
Unified Shaders 2880 3584
Texture Mapping Units 240 224
Render Output Units 48 96
Bus Type GDDR5 GDDR5X
Bus Width 384-bit 384-bit
Fab Process 28 nm 16 nm
Transistors 7080 million 12000 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.0 DirectX 12.0
OpenGL Version OpenGL 4.4 OpenGL 4.5

Memory Bandwidth: Bandwidth is the maximum amount of data (counted in MB per second) that can be transported across the external memory interface within a second. The number is worked out by multiplying the interface width by its memory clock speed. If the card has DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.

GeForce GTX 780 Ti

Nvidia Titan X

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